<template>
  <div class="login_container">
      <div class="login_box">
        <!-- 头像区 -->
        <div class="avatar_box">
          <img src="../assets/logo.png" alt="">
        </div>
        <!-- 表单区 -->
        <el-form  class="login_form" label-width="0px" 
        :model="loginForm"
        :rules="loginFormRules"
        ref="loginFormRef"
        >
          <!-- 用户名 -->
           <el-form-item prop="username">
             <el-input
              prefix-icon="el-icon-user-solid"
              v-model="loginForm.username"
             ></el-input>
           </el-form-item>
           <!-- 密码 -->
           <el-form-item prop="password">
             <el-input
               prefix-icon="el-icon-lock"
               v-model="loginForm.password"
               type="password"
             ></el-input>
           </el-form-item>
           <!-- 按钮 -->
           <el-form-item class="btns">
             <el-button type="primary" @click="login">登录</el-button>
             <el-button type="info" @click="onClear">重置 </el-button>
           </el-form-item>
        </el-form>
      </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 登录信息
      loginForm:{
        username:'admin',
        password:'123456'
      },
      // 表单验证规则
      loginFormRules:{
        // 验证用户名
        username:[
          {required:true, message:'请输入用户名',trigger:"blur"},
          {max:10,min:4, message:'请输入正确的用户名',trigger:"blur"}
        ],
        // 验证密码
        password:[
           {required:true, message:'请输入密码',trigger:"blur"},
           {max:15,min:6, message:'请输入正确的密码',trigger:"blur"}
        ]
      }
    }
  },
  methods:{
    // 登录
    login(){
      this.$refs.loginFormRef.validate(async val=>{
        if(!val) return;
        const {data:res} = await this.$http.post('login',this.loginForm);
        if(res.meta.status !==200) {
          this.$refs.loginFormRef.resetFields();
          return this.$message.error("用户名或密码不存在")
        }
        this.$message.success("登录成功")
        console.log(res);
        // 在session中保存token令牌
        window.sessionStorage.setItem('token',res.data.token);
        // 跳转到首页
        this.$router.push('/home')
      })
    },
    // 重置表单
    onClear(){
      this.$refs.loginFormRef.resetFields();
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
  background-color: #2b4b6b;
  height: 100vh;

  .login_box{
    width: 500px;
    height: 350px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform:translate(-50%,-50%);

    .avatar_box{
      height: 130px;
      width: 130px;
      border: 3px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%,-50%);
      background-color: #fff;
      img{
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
    .btns{
      display: flex;
      justify-content: space-between;
    }
    .login_form{
      position: absolute;
      bottom: 50px;
      width: 100%;
      padding: 0 30px;
      box-sizing: border-box;
    }
  }
}
</style>